gre数学考试关于算术的重点试题(3)

　　考生如果觉得复习gre数学考试比较难不妨从这些题目练习开始，每篇都是按照分类给大家列举了一些典型题目，本篇主要是针对gre数学考试算术方面的典型题目及答案。下面是21-30题。

　　21. The sum of n different positive integers is less than 100. What is the greatest possible value of n?

　　A.10

　　B.11

　　C.12

　　D.13

　　E.14

　　答案：D

　　22.If p is a prime number greater than 11, and p is the sum of the two prime numbers x and y, then x could be which of the following?

　　A.2

　　B.5

　　C.7

　　D.9

　　E.13

　　答案:A

　　23.Of the positive integers that are multiples of 30 and are less than or equal to 360, what fraction are multiples of 12?

　　A.1/6

　　B.1/5

　　C.1/3

　　D.2/5

　　E.1/2

　　答案:E

　　24.If x, y and z are consecutive integers and x

　　. xyz is even.

　　. x+y+z is even.

　　. is odd.

　　A. None

　　B. only

　　C. only

　　D.andonly

　　E. ,and

　　答案：D

　　25.The product of two consecutive positive integers cannot be

　　A. a prime number

　　B. divisible by 11

　　C. a multiple of 13

　　D. an even number less than 10

　　E. a number having 4 as its units digit.

　　答案：E

　　26.When a certain number is divided by 7, the remainder is 0. If the remainder is not 0 when the number is divided by 14, then the remainder must be

　　A.1

　　B.2

　　C.4

　　D.6

　　E.7

　　答案：E

　　27.How many of the positive integers less than 25 are 2 less than an integer multiple of 4?

　　A.2

　　B.3

　　C.4

　　D.5

　　E.6

　　答案：E

　　28. If y is the average of n consecutive positive integers, n1,what is the sum of the greatest and least of these integers?

　　A. 2y

　　B. ny

　　C. y/2

　　D. y/n

　　E.2n/y

　　答案：A

　　29.A positive integer with exactly two different divisors greater than 1 must be

　　A. a prime

　　B. an even integer

　　C. a multiple of 3

　　D. the square of a prime

　　E. the square of an odd integer

　　答案：D

　　30.What is the least prime number greater than 83?

　　A.85

　　B.87

　　C.88

　　D.89

　　E.91

　　答案：D

　　每到题目都是关于gre数学考试的典型题目，考生可以根据题目来复习知识点，这样更有针对性。